VOLTAGE REGULATOR. HMC976LP3E Datasheet

HMC976LP3E REGULATOR. Datasheet pdf. Equivalent

Part HMC976LP3E
Description LINEAR VOLTAGE REGULATOR
Feature v02.1112 Typical Applications The HMC976LP3E is ideal for: • Test Instrumentation • Military Radios,.
Manufacture Analog Devices
Datasheet
Download HMC976LP3E Datasheet



HMC976LP3E
v02.1112
Typical Applications
The HMC976LP3E is ideal for:
• Test Instrumentation
• Military Radios, Radar and ECM
• Basestation Infrastructure
• Ultra Low Noise Frequency Generation
• Fractional-N Synthesizer Supply
• Microwave VCO Supply
• Mixed-Signal Circuit Supply
• Low Noise Baseband Circuit Supply
HMC976LP3E
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Features
High Output Current: 400mA
Low Dropout: 300mV at 400mA Output and VR>3V
Ultra Low Noise: 3nV/√Hz at 10 kHz, 6nV/√Hz at 1 kHz
High Power Supply Rejection Ratio (PSRR):
<-60 dB at 1 kHz, <-30 dB at 1 MHz
Adjustable Voltage Output: VR 1.8 to 5V at 400mA
Designed to work with low ESR ceramic capacitors
Low Power-Down Current: <1 µA
Thermal Protection
16 Lead 3x3 mm SMT Package: 9mm²
Functional Diagram
General Description
The HMC976LP3E is a BiCMOS ultra low noise
linear voltage regulator. The high Power Supply
Rejection Ratio (PSRR) in the 0.1 MHz to 10 MHz
range provides excellent rejection of any preceding
switching regulator or other power supply noise.
The voltage output is ideal for frequency generation
subsystems including Hittite’s broad line of PLLs with
integrated VCOs.
The output voltage can be adjusted lower than the
default value by using one external resistor. The output
can be set to 5V by grounding the HV pin. The regulator
can be powered down by the TTL-compatible Enable
input. The HMC976LP3E is housed in a 3x3mm QFN
SMT package.
Table 1. Electrical Specifications, TA = +25 °C
Parameter
Output Voltage VR (Default)
Output Voltage VR (5V setting)
Output Voltage Tolerance
Input Voltage Range (Default)
Input Voltage Range
Output Voltage Range VR
Conditions
Min
Typ
Max
Units
Vdd = 5.5V; Maximum load current
4.7
4.8
4.9
V
Vdd = 5.5V; Maximum load current
4.9
5
5.1
V
Vdd = 5.5V; Maximum load current;
Default and 5V setting
2
%
Default output voltage configuration
5.1
5.5
V
For VR>3V[1] VDD>VR+0.3V
3.3
5.5
V
Set by external resistors.
1.8
5.1
V
[1] See Absolute Maximum Ratings Table “Absolute Maximum Ratings”
1
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HMC976LP3E
HMC976LP3E
v02.1112
400mA LOW NOISE, HIGH PSRR
LINEAR VOLTAGE REGULATOR
Table 1. Electrical Specifications (Continued)
Parameter
Conditions
Min
Reference Voltage VREF
Vdd = 5.5V; REF cannot source/sink
external current
Output Current VR [1]
Output Noise Spectral Density
10 Hz
100 Hz
1 kHz
10 kHz
100 kHz
Integrated Output Noise 100 Hz to 100 kHz
TA = -40°C to +85°C
Vdd = 5.5V; VR = 5.0V
Measured on Application Schematic [3]
Maximum Load Current
Vdd = 5.5V; VR = 5.0V [3]
Load Regulation, VR
Vdd = 5.5V; VR=5.0V
PSRR
1 kHz
10 kHz
100 kHz
1 MHz
10 MHz
50 MHz
Vdd = 5.5V; VR=5.0V
Maximum load current
Output Voltage Variation vs. Package
Base Temperature
25°C to 85°C
-40°C to 25°C
Vdd = 5.5V; VR=5.0V
Maximum load current
Current Consumption (IGND)
Ven = Vdd = 5.5V;
Maximum Load Current
Power Down Current
Vdd = 5.5V; EN = Low; Output is float-
ing (high - impedance) in Power-Down
mode
Start-Up Transient Time
0 to 90% of final voltage
Vdd = 5.5V[3]
Enable Input EN High Level
Vdd>=VEN
2
Enable Input EN Low Level
Vdd>=VEN
0
Output Load Capacitance [2]
To guarantee stability, noise and PSRR
performance [3]
4.7
Thermal Protection Threshold Junction
Temperature [4]
Junction Temperature Rising
115
Thermal Protection Hysteresis
Typ
1.17
4000
120
6
3
3
1.5
-70
-65
-45
-35
-30
-20
0.005
0.005
1.1
130
10
Max
Units
V
400
mA
nV/rtHz
µVrms
0.01
% / mA
dB
0.01
% / °C
0.01
% / °C
1.5
mA
1
µA
200
ms
Vdd
V
0.8
V
µF
°C
°C
[1] The regulator does not include short-circuit protection circuitry. The outputs will withstand short-circuit conditions for a duration <10s. The
thermal protection is not intended to be used as a short circuit protection
[2] HMC976LP3E was designed to work with low ESR ceramic capacitors connected to pin 4 VRX.
[3] See HMC976LP3E 5.0V User Application Schematic herein
[4] See figures 14,15, and 16
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2
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